Boiler-tube roller-expander.



R. J. ADAMS. BOILER TUBE ROLLER EXPANDER. APPLICATION FILED sums, 1914.

1,108,655. Patented Aug.25,1914.

Fig.5.

132mm: W661 \IZMMCMM WWW) THE NORRIS PETERS CO., PHOTO-LITHO WASHINGTON. D. C

UNITED STATES PATENT QFFIE RALEIGH J. AIDAIVIS, OE LOS ANGELES, CALIFORNIA.

BOILER-TUBE ROLLEB-EXPANDER.

Application filed January 26, 1914.

To all whom it may concern Be it known that I, Barman J. Animus, a citizen of the United States, resident of Los Angeles, in the county of Los Angeles and State of California, have made a certain new and useful Invention in Boilerllube Roller-Expanders; and I declare the follow ing to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it appertains to make and use the invention, reference being had to the accompanying drawings, and to letters or figures of reference marked there on, which form a part of this specification.

Figure 1 is a central longitudinal section of the invention as applied. on the line 11, Fig. 2. Fig. 2 is an end view of the in ven tion. Fig. 3 is a side view of the invention. Fig. l is a detail face view of the reversing plate. Fig. 5 is a detail side view of one of the rollers.

The object of the invention is to provide an improvement in means for expanding the ends of tubes, and particularly of boiler tubes, and the invention consists in the novel construction and combination of parts, as hereinafter set forth.

In the accompanying (:lrawings, illustrating the invention, the numeral 3 indicates a frame head, and 9 a frame plate which is connected thereto by means of frame bolts 8, usually three in number, said bolts being shouldered at 11 and 12, to insure parallelism of the frame plates.

Between the shoulders 11 and the framing at 8 is located a reversing plate or collar l, having slots 14: extending circumferentially, through which the bolts 8 pass. Between the circumferentially extending slots are provided, in the collar, radially extending recess bearings 10. Recess bearings 19 are provided in the frame piece 9, opposite the bearings 10.

A guard plate 2 engages a shoulder of the head 3, and has flange extensions 15 angularly projecting therefrom, said extensions being exterior to and parallel to the circumference of the reversing collar. This plate is loosely mounted on the frame head, to allow it to remain stationary while the roller frame turns.

A back cap or guard holder 1 is secured on the plate by means of nuts 16 of the bolts 8, which, being outside or at the back of the Specification. of Letters Patent.

Iiatented An 25, 1914.

Serial No. 814,486.

stock, are not liable to become loose. The reversing collar 4 is provided with a central circular aperture 17, and similar circular apertures are made in the f "ame pieces 9 and 3 and in the back cap.

Between the reversing collar and the frame piece 9 are located the operating or expanding cylindrical rollers 7, each roller being seated between two bolts 8 and having centrally at each end a rounded projection or knob 18, whereby loose pivotal engage ment is made with the recess bearings of the frame piece, and of the reversing collar. The knobs or projections 18, are of conoid convex form, their sides sloping to the junction with the ends of the rollers, it being designed that the rollers shall readily assume such inclined axial position in the frame, as may be required under the adj ust ment, without escaping from their bearings.

Each roller may be made in one piece for straight work or where it is not required to bell or curve the outward end of the tube.

-Usually, however, in order to expand and,

at the same time bell the end of the tube, in-. stead of a single roller between each two bolts, two rollers 5, and 6, are employed, the roller 5, being comparatively short and flat, as compared with the roller 6, and having its diameter a little 'reater than that of roller 6, which is, witn the exception of its length, like the roller '7. These two rollers 5 and 6, are placed end to end, the roller 5, engaging the radially extended seat of the reversing collar by n'ieans of the rounded pivotal project-ion 21, and having an enlarged recess seat 22, in its opposite end, engaging the rounded pivotal projection, of the roller The operating mandrel or taking pin, which passes through the apertures of the stock, and engages the rollers, is indicated at 2 1.

Wall of the tube and expanding the latter ag inst the margin of the aperture on the tube sheet. At the same time, the mandrel forces the flat or belling roller 5 against the end portion of the tube, and, because of the sharp curvature of that edge of this roller, adjacent to the end of roller 6, as indicated at 27, and its projection beyond the circumference of the end of said roller 6, the tube end is designed to be belled or expanded out- Ward, in such Wise as to provide a bearing of the tube against the sheet.

If it is desired to rcverse'the roller, all that is necessary is to loosen frame bolts 8 and reverse the collar l to the limit of the circumferential bearings, and a then to tighten the bolts. The axial inclination of the rollers, to the right or to the left, thus produced, is SllfllClGIlll for self feeding, as the pin is turned around, this inclination being not greater than five-eighths of an inch to the foot. Or, the rollers may be set straight or Without right or left inclination, by adjusting the reversing collar to an intermedi atevposition. The stock or frame, being made up of the parallel plates and the shouldered bolts, is of skeleton form, and is so constructed to avoid harboring scale or extraneous matter, liable to interfere With the automatic action of the rollers. The pivotal projections on the ends of the rollers are de signed to adjust themselves easily in the recess seats, their rounded ends moving as required to different positions of the floors or bottom bearings 30 of such seats. These little knobs or rounded projections are, however, of sufficient extent to prevent the escape of the rollers from the recess bearings When the mandrel is Withdrawn.

What I claim is 1. In a tube expander, a mandrel, a carrier frame upon said mandrel, expanding rollers in said frame, and means for adjusting and reversing said rollers to advance or retract one end thereof in the direction of rotation of the mandrel.

2. In a tube expander, a mandrel, acarrior frame upon said mandrel embodying end pieces, and means for connecting said end pieces having shoulders bearing against said pieces, expanding rollers in said f1 .me, and means for adjusting and reversing said rollers to advance or retract one end thereof in the direction of rotation of the mandrel.

3. In a tube expander, a carrier frame embodyin end members, and means of connection for said end pieces having shoulders bearing against said pieces, said end pieces having elongated recess bearings, expanding rollers having end projections seated in said recesses, and means including one of said end pieces for adjusting and reversing said rollers to oppositely inclined and straight positions.

4L. In a tube expander, a carrier frame embodying end members, and means of connection for said end members having shoulders bearing against said members, said men'ibers having elongated recess bearings, expanding rollers having rounded conoid end projections seated in said recess bearings, one of said end members being circularly adjustable for adjusting and reversing said rollers to oppositely inclined and straight positions.

5. in a tube expander, a carrier frame embodying end. members and longitudinal bolts connecting said end members to provide, a skeleton frame and having shoulders bearing against said end members, expanding rollers in said frame, and means for adjusting said rollers to oppositely inclined and straight positions.

in a tube expander, a carrier frame embodying end i'nembers and longitudinal bolts connecting said members to provide a skeleton frame and having shoulders bearing against said members, said members having radially elongated recess bearings, expanding rollers having rounded conoid end projections seated in said recess bearings, and one of said end members having elongated slots engaging said bolts and being circularly adjustable to adjust said rollers to oppositely inclined. and straight positions.

'7. In a tube expander, a mandrel, a carricr frame upon said mandrel, expanding rollers in said frame, means for adjusting said rollers to advance or retract one end thereof in, the direction of rotation of the mandrel, and belling rollers separate from the expanding rollers and having a joint connection therewith. v e

8. In a tube expander, a carrier frame embodying end members and means ofconnection for said members having shoulders bearing against said members, said members having elongated recess bearings, expanding rollers having rounded conoid end projections seated in said recess bearings, said expanding rollers having each a belling roller separate therefrom and having a joint connection therewith, and one of said members being adjustable to adjust said rollers to oppositely inclined and straight posit-ions.

f). In a tube expander, ,a carrier frame embmlying end membersand means of connection for said members having shoulders bearing against the same, said members having elongated recess bearings, expanding rollers having rounded conoid end projections seated in said recess bearings, tltl expanding rollers having each a belling roller separate therefrom and having a conoid nub and socket joint connection therewith, and one of said members being adjustable to adjust said rollers to oppositely inclined and straight positions.

10. In a tube expander, a carrier frame,

ill-O expanding rollers in said frame, means for In testimony whereof I affix my signature, ad ustlng said rollers to oppositely lnchned in presence of two witnesses.

and to straight positions, and belling rollers RALEIGH J. ADAMS. separate from the expanding rollers and l/Vitnesses: having a conoid nub and socket joint con- GERTRUDE E. FREEMAN,

neotion therewith. ALICE E. ARCHER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G." 

